Best Connecticut Ethereum Blockchain Development Companies

7 Companies - Rankings updated: April 01, 2026

DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.

United States × Connecticut ×

AppMakers USA
Top US Mobile & Web App Development Agency
AppMakersUSA is a US-based full-service mobile application development company. We specialize in building cross-platform websites and apps (meaning iOS & Android for the price of one), informing your business decisions from a technical perspective, and being transparent in our process & thinking. [... see all AppMakers USA reviews ]
Location
Stamford, Connecticut
Number of Employees
Under 49
Minimal Budget
$10,000 - $25,000
Portfolios Count
83 Projects Listed
AppMakers USA Services
Mobile App Development
UI/UX Design
AI Development
Software Development
Web Design
Staff Augmentation
Web Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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App Development Project for Food and Beverage Company Walmart
App Development Project for Entertainment Company Eksperience (NFL)
App Development Project for Health Care Company CVS Pharmacy
App Development Project for Education Company Number Hive
App Development Project for Education Company ClassCalc
Artificial Intelligence Project for Hobbies & Gifts Company Echo Journal
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Comprehensive analysis done by DesignRush Agency Experts.
AppMakers USA Reviews & Testimonials
Awital Ifrah Program manager at Masa Israel journey
5.0★
Cross-Platform Review from Awital Ifrah
Masa came in with a pretty loose idea and AppMakers helped turn it into something solid. What I appreciated most is they didn't overcomplicate it or try to make it into some giant monster platform. They listened, asked smart questions, and helped us focus on what would actually matter for alumni and current participants. The end result felt thoughtful and realistic. I'd definitely work with them again.
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Moishi Stern Customer support at Madlan
5.0★
Startup Review from Moishi Stern
We create live events. We wanted a site that shows what we do without making people dig. AppMakers listened, trimmed the fluff, and gave us pages that read fast and look good on a phone. The quote form asks the right things and our team can update galleries without calling a developer. They stayed on schedule and answered messages the same day. The whole process was calm and clear. We already see better inquiries. It feels like a real upgrade, even before the full rebuild.
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Jubilee Haddasah Munozvilla CEO at Its Kinda Catchy
5.0★
Small Business Review from Jubilee Haddasah Munozvilla
We loved working with AppMakers. They built us a procurement system to help quickly and easily secure materials for our labs. The process was smooth and the outcome was stellar.
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Reviews verified by DesignRush and sourced from the agency's profile
CVS Pharmacy
Austin Ekeler (NFL Player)
ClassCalc
Number Hive
BookClub
Arcxis
Debate club
Bayut
Los Angeles Apparel
Sun Scooter
Data sourced from the agency's DesignRush profile
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5.0 5.0 (63)
Quartus Technology, Inc
The undisputed authority on BLE Bluetooth IoT and AI App Development
We are the undisputed authority on Bluetooth BLE, IoT, and AI applications. Our Bluetooth and AI applications have proven to be very effective to clients across the United States and Europe. Call us for a free technical consultation and evaluation of your project. [... see all Quartus Technology, Inc reviews ]
Location
Westport, Connecticut
Number of Employees
50 - 99
Portfolios Count
16 Projects Listed
Quartus Technology, Inc Services
Mobile App Development
Web Development
Software Development
Product Design
AI Development
eCommerce Development
Blockchain
Digital Marketing
VR/AR
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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App Development Project SwingU: Golf GPS Range Finder
App Development Project Beaver Creek Village Guide
App Development Project The Establishment 1898
App Development Project Auto Parkit
App Development Project Auto ChargeIt
App Development Project Spinning Mandalas
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Comprehensive analysis done by DesignRush Agency Experts.
Quartus Technology, Inc Reviews & Testimonials
Robert Kriegsman IT Consultant at Software Development Company
5.0★
Translation Services Review from Robert Kriegsman
Quartus deleoped an enterprise system for me to help track and analyze information on various activities, involvong data ingestion and analysis, then presentation. Quartus Technology, Inc.'s reliability and innovative solutions stood out.
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Laura Waniuk Senior Manager, Events and Brand Creative Services at Bad Robot Games
5.0★
Mobile App Development Review from Laura Waniuk
During my tenure at Beaver Creek Resort Company I was tasked with building and launching a guest-facing app for the hundreds of thousands of visitors to Beaver Creek Mountain. I worked very closely with Quartus Technology and their team to meet the budget, the timeline and all the required features for the project. The app launched early! It's been an incredible success and the app has continued into phase 2 and 3 with added functions. I highly recommend Quartus Technology if you are in search of a quality app, strong development team and transparent pricing.
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Chris Caputo, PMP Director of Project Management at CATIC
5.0★
Mobile App Development Review from Chris Caputo, PMP
After looking at multiple vendors to build an app to provide information on municipalities we selected Quartus. The scope included the development of the app (including designs) and integration to a service that our development team created. Quartus was successful. They delivered in a timely, cost-efficient manner and were easy to work with. When we decided to have a second app created, we did not look elsewhere and stayed with Quartus. This app involved the development of a calculator to calculate and email title insurance premiums. Like our first app, Quartus had to develop the designs (they were able to leverage a portion of the work from our first app) and integrate to a different service that our development team created. Once again, Quartus delivered. These apps were for Android and iOS. They are a good partner.
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Reviews verified by DesignRush and sourced from the agency's profile
Avis Budget Group Ireland
Thrifty Car Rental Ireland
Omega Flex, Inc.
Vail Resorts
Dasher Lawless
SwingU
Hertz Ireland
Creative Racing
Aeropath Aviation
Beaver Creek
Data sourced from the agency's DesignRush profile
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4.9 4.9 (9)
4.8 4.8 (17)
EffectiveSoft
FUELING DISRUPTION
We're EffectiveSofta custom software development company delivering effective digital solutions. Whether it's new product creation or scaling and maintaining complex systems, we empower businesses to grow and disrupt their industries. [... see all EffectiveSoft reviews ]
Location
Stamford, Connecticut
Number of Employees
250 - 499
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
29 Projects Listed
EffectiveSoft Services
Software Development
Mobile App Development
Big Data Analytics
AI Development
ERP Consulting
IoT
Cloud Consulting
DevOps Consulting
UI/UX Design
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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Artificial Intelligence Project for AI Company GenAI-agent powered voice assistant for Tesla
Cloud Application Development Project for Entertainment Company A cloud-based solution for creating interactive videos
AI Consulting Project for Fintech Company AI opportunity mapping for a credit management company
AI Automation Project for Automotive Company AI-driven ETL modernization for Authenticom
Agentic AI Project for Fintech Company An AI assistant that turns natural-language requests into decision-ready dashboards
Software Consulting Project for Fintech Company Architecture readiness review for regulated market expansion
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Comprehensive analysis done by DesignRush Agency Experts.
EffectiveSoft Reviews & Testimonials
Philipe Araujo Business Analyst and Quality Engineer at Motive Retail
4.8★
Software Development Review from Philipe Araujo
We have had a highly positive experience utilizing EffectiveSoft's staff augmentation services for our Business Analyst and Quality Engineer needs. The professionals provided were not only highly skilled and knowledgeable but also integrated seamlessly with our existing team, requiring minimal ramp-up time. Their expertise in their respective fields significantly enhanced our project's efficiency and overall quality. We confidently recommend EffectiveSoft for any organization seeking top-tier talent to augment their teams and drive successful project outcomes.
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Sasja Ihn Christensen Senior Director, Head of Digital Business Development at MAERSK BROKER
5.0★
Software Development Review from Sasja Ihn Christensen
Maersk Broker is pleased to provide this reference letter for EffectiveSoft, our trusted collaborator for complex web projects. From the initial stages of our projects, the team at EffectiveSoft demonstrated a deep understanding of our requirements and have been apro-active part of any problem-solving process. The team of offshore developers has been well-run through their lead developer, and we have only experienced a professional approach to our projects, as well as a pleasant and trust-based collaboration = between all members in the EffectiveSoft team and our own team. EffectiveSoft has furthermore proved to be highly flexible, adapting to our evolving needs and delivering reliable results under shifting circumstances and shifting priorities. They have furthermore been very quick to find and add the necessary resources to the team when needed, and we have only experienced professional and highly skilled consultants. This has also made on-boarding into projects faster and more efficient.In conclusion, it has been a pleasure working with EffectiveSoft, and I have no doubt that they will continue to be an asset to any collaborators in the future, adding value through their professionalism, dedication and understanding of business needs.
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Matt Hobbs Chief Product Officer at Canopy
5.0★
Software Development Review from Matt Hobbs
I am writing to recommend EffectiveSoft, a technology consulting company that has been providing services to Canopy for the last four years. During this time they have consistently demonstrated professionalism, expertise, and a strong commitment to meeting deadlines for our business outcomes.. Canopy’s mission is to improve the financial resilience of UK renters, and support the Agents and Landlords they rent from with our powerful referencing platform. EffectiveSoft has been a key partner, working with us to deliver our product and engineering roadmaps as we continue to grow and scale. Their skilled team of engineers has worked to understand our unique product needs and deliver quality platform increments following agile principles.One of the most impressive qualities of EffectiveSoft is their ability to respond flexibly to our changes in direction, and meet evolving delivery deadlines, overseen by Kirill Makarenko, our technical project manager. Kirill and the team’s strong work ethic, capability and diligence has been crucial in the successful execution of our projects. It is rare to come across an external development team that remains steadfast in its commitment to service standards and business continuity, and here EffectiveSoft have excelled. Based on our experience, I would highly recommend EffectiveSoft for any organisation seeking technology delivery services. Their dedication, responsiveness, and commitment to delivering results make them an invaluable partner.
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Reviews verified by DesignRush and sourced from the agency's profile
CITY INDEX
TruBridge
CNote
Plato
Intelon Optics
InCheq
Nissin Foods
Soutron Ltd.
BullionRock
InContinuum
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4.8 4.8 (8)
5.0 5.0 (2)

Talentica Software
Building Products AI-Native Way
Talentica Software is a leading product engineering company that helps startups, growth-stage, and technology companies build end-to-end products and achieve business outcomes. The company has specialized in AI & Machine Learning, Generative AI, Data Engineering, Blockchain, and Big Data [... see all Talentica Software reviews ]
Location
Stamford, Connecticut
Number of Employees
500 - 999
Average Hourly Rate
$30/hr
Minimal Budget
$50,000 & Up
Portfolios Count
7 Projects Listed
Talentica Software Services
Software Development
AI Development
IT Services
Big Data Analytics
Cybersecurity
Blockchain
Mobile App Development
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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Software Development Project for Media & Communications Company Increasing Revenue Realization Using Data Science
Software Development Project for Finance Company Rationalizing Investment Decisions Using Data Science
Software Development Project for Software & IT Services Company Idea to MVP in 120 days
Software Development Project for Fintech Company MVP to Enterprise-Ready
Software Development Project for Fintech Company Idea to $130 Mn Acquisition
Software Development Project for Crypto Company Blockchain-Powered Product Development
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Comprehensive analysis done by DesignRush Agency Experts.
Talentica Software Reviews & Testimonials
Ashish Sharma Sr Engineering Manager at OpenGov India Pvt Ltd
4.7★
Software Development Review from Ashish Sharma
Talentica has proven to be an exceptional software outsourcing partner, consistently exceeding expectations in both the quality of their resources, deliverables and their commitment to our success. They function not merely as a vendor, but as an extension of our core engineering team.Key Highlights of our Partnership:High Resource Quality: The engineers provided by Talentica are technically strong and highly competent. They integrate seamlessly with our internal teams and quickly take ownership of complex projects.Commitment and Reliability: Talentica is a truly reliable partner that consistently demonstrates a strong willingness to go beyond the standard scope of work. They proactively identify risks and contribute innovative solutions.Critical Project Support: Their expertise was pivotal in two critical areas:Data Pipeline & Reporting: They were instrumental in both enhancing and maintaining a reliable data pipeline & reporting infrastructure. Software Upgrades: They managed challenging, large-scale software upgrades, ensuring we successfully transitioned to modern technology stacks with minimal disruption.Overall, Talentica is a dependable and high-value partner assisting our mission-critical projects.
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Anonymous Advisor at IT Company
5.0★
Software Development Review from Anonymous
We had created a conceptual framework to authenticate and verify the provenance, transaction history, and authorship of blockchain-based NFTs. Talentica was brought on board to test and refine the concept from both functional and engineering perspectives, and later to build a Minimum Viable Product (MVP) aligned with the agreed specifications and constraints.
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Anonymous Engineering Manager at SaaS Company
5.0★
Software Development Review from Anonymous
For several years, the team was composed entirely of Talentica contractors. Since January 2022, I have been directly managing them. The Talentica team handled the admin tooling backend, which included multiple Python Flask services with Postgres and Elasticsearch. These services operated in a service-oriented architecture deployed on Kubernetes, using Istio for service mesh and Spinnaker for deployments.
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Reviews verified by DesignRush and sourced from the agency's profile
Wideorbit
Sema4.AI
Realization Technologies Inc.
TailoredMail
StructuredWeb Inc
Amplify
Mist Systems (Juniper Company)
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4.9 4.9 (27)
4.4 4.4 (238)
Soft Does
Custom Software That Works in the Real World
SoftDoes builds custom software, AI, and web applications for mid-market companies that need enterprise-grade results without the overhead of an in-house team. U.S.-based leadership. Full IP ownership. No lock-in. [... view Soft Does profile ]
Location
Hartford, Connecticut
Number of Employees
50 - 99
Average Hourly Rate
$75/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
1 Project Listed
Soft Does Services
Software Development
AI Development
Mobile App Development
Web Development
UI/UX Design
Cloud Consulting
Blockchain
Software Testing
Digital Strategy
Big Data Analytics
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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Software Development Project for Health Care Company Custom Finance Platform for Healthcare Practice
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Comprehensive analysis done by DesignRush Agency Experts.
Altera
Brizacorp
Color and Harmony
FMY Orthodontics
Data sourced from the agency's DesignRush profile
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OnePlusOne Solutions
Design and development, as simple as OnePlusOne
OnePlusOne Solutions is a global team of designers, developers, and strategists, working collectively to craft impactful products, captivating websites, and bold visual identities for innovative brands. By merging our creative and technical expertise, we bring big ideas to life. [... view OnePlusOne Solutions profile ]
Location
Norwalk, Connecticut
Number of Employees
50 - 99
Minimal Budget
$1,000 - $10,000
Portfolios Count
2 Projects Listed
OnePlusOne Solutions Services
Digital Services
Mobile App Development
Web Development
Blockchain
Product Design
Web Design
Graphic Design
UI/UX Design
eCommerce Development
Design Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Clients and Projects
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App Development Project Redy App
App Development Project Mobe3 Live App
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Comprehensive analysis done by DesignRush Agency Experts.
OnePlusOne Solutions Reviews & Testimonials
CreativeConnections Review from Google
5.0★
CreativeConnections's Review Sourced from Google
Excellent service provider and knowledgeable resource. Highly recommend OnePlusOne Solutions for any design or development project, complex or simple.
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max fanwick Review from Google
5.0★
max fanwick's Review Sourced from Google
1+1 Solutions is a great provider of all design services and needs. I operate a development company and to have such a fast responding and well versed design company to be able to bring on projects is an irreplaceable asset.
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Reviews verified by DesignRush and sourced from the agency's profile
Johnson & Johnson MedTech
Roobet
EVS LLC
Quiver Quantitative
Monument Studios
Cad & The Dandy
Michael Marshall Design
Tripak Industries
Amptrex
Thinaer
Data sourced from the agency's DesignRush profile
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5.0 5.0 (4)
VLink Inc
Leading Software Development Company.
VLink is a leading software development service provider specializing in top-tier digital solutions. Focusing on innovation and excellence, we deliver tailored solutions to meet clients unique needs, ensuring agility, security, and growth in the digital era. [... view VLink Inc profile ]
Location
South Windsor, Connecticut
Number of Employees
500 - 999
Average Hourly Rate
$50/hr
Minimal Budget
$10,000 - $25,000
VLink Inc Services
AI Development
Mobile App Development
Software Development
Software Testing
Web Development
Cloud Consulting
Cybersecurity
DevOps Consulting
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
VLink Inc Reviews & Testimonials
Olive Peterson Review from Google
5.0★
Olive Peterson's Review Sourced from Google
You can't beat the VLink guys when it comes to designing and developing. From the start, I hired them to build my website and gave them all my specifications and preferences. I was very happy with their work and they advised me on some better alternatives where possible. Their assistance with all stages of designing and developing our website, from the first interaction to the launch, was invaluable. All of the components of the project were delivered on time, with excellent quality, and they provided satisfactory support until the end. I would recommend them without hesitation.
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Ajitabha Bose Review from Google
5.0★
Ajitabha Bose's Review Sourced from Google
I have found working with VLink to be an exceptional experience despite my initial trepidation regarding establishing a relationship with a company situated so far away.The VLink experts have strived for excellence, no matter how difficult it has proven to be. After receiving a product of the highest quality, my expectations had been exceeded. I was impressed by the professionalism, responsiveness, and patience of the project manager who dealt with my requirements. Even the amount that was quoted to me was in line with my expectations. Now I consider myself to have gotten more for my money than I expected.
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Sarthak Anand Review from Google
5.0★
Sarthak Anand's Review Sourced from Google
We experienced a breath of fresh air when we switched to VLink's Managed Solution. They carefully analyzed our entire ecosystem and offered multiple recommendations for improving our system (not just one). They also implemented various cost-saving measures. We incrementally upgraded our equipment and software solution as needed. You can choose from a variety of options, and they will work according to your timeline, your needs, your budget, and your staff's ability to change. I have not detected a lapse-in fact as far as knowledge is concerned, and I have learned much from them! Which is of particular importance since we work around the clock.
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Reviews verified by DesignRush and sourced from the agency's profile
Marico Bangladesh Limited
Baystate Health
Selective Insurance
Stanley Black & Decker
VE Commercial Vehicles Ltd.
ConnectiCare
Data sourced from the agency's DesignRush profile
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4.2 4.2 (18)

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Best Connecticut Ethereum Blockchain Development Companies

Top US Mobile & Web App Development Agency

AppMakers USA Services

Clients and Projects

AppMakers USA Reviews & Testimonials

Cross-Platform Review from Awital Ifrah

Startup Review from Moishi Stern

Small Business Review from Jubilee Haddasah Munozvilla

The undisputed authority on BLE Bluetooth IoT and AI App Development

Quartus Technology, Inc Services

Clients and Projects

Quartus Technology, Inc Reviews & Testimonials

Translation Services Review from Robert Kriegsman

Mobile App Development Review from Laura Waniuk

Mobile App Development Review from Chris Caputo, PMP

FUELING DISRUPTION

EffectiveSoft Services

Clients and Projects

EffectiveSoft Reviews & Testimonials

Software Development Review from Philipe Araujo

Software Development Review from Sasja Ihn Christensen

Software Development Review from Matt Hobbs

Building Products AI-Native Way

Talentica Software Services

Clients and Projects

Talentica Software Reviews & Testimonials

Software Development Review from Ashish Sharma

Software Development Review from Anonymous

Software Development Review from Anonymous

Custom Software That Works in the Real World

Soft Does Services

Clients and Projects

Design and development, as simple as OnePlusOne

OnePlusOne Solutions Services

Clients and Projects

OnePlusOne Solutions Reviews & Testimonials

Leading Software Development Company.

VLink Inc Services

VLink Inc Reviews & Testimonials

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